Hello

We have sccm r2 environment, i tried to create custom report but report builder require to enter data source credentials to continue but an error message popup " unable to connect to data source- The certificate chain was issued by an authority that is not trusted ".

I checked test connection and its working fine. I have created many reports before but i changed administrator password after that.

Regards

Can you look at this and see if this fix your issue

http://www.ronnipedersen.com/2014/12/sql-report-builder-unable-to-connect-to-data-source/